diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index ef4f4b0ce..a4f6079df 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -17,6 +17,27 @@ jobs:
           mvn --batch-mode -Pverify-format clean compile
         shell: 'bash'
 
+  codecov:
+    name: Codecov
+    continue-on-error: true
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+      - name: Set up JDK
+        uses: actions/setup-java@v3
+        with:
+          java-version: 21
+          distribution: 'temurin'
+#      - name: Install dependencies
+#        run: mvn install -DskipTests=true -Dmaven.javadoc.skip=true -B -V
+      - name: Run tests and collect coverage
+        run: mvn -B test
+      - name: Upload coverage reports to Codecov
+        uses: codecov/codecov-action@v3
+        env:
+          CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}
+
   build:
     runs-on: ubuntu-latest
     strategy:
diff --git a/CHANGELOG.md b/CHANGELOG.md
index dca2a7073..65a646fd8 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,9 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/)
 and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.html).
 
 ## [Unreleased]
+### Added
+- Code coverage. [#11](https://github.com/tzaeschke/phtree-cpp/pull/11)
+
 ### Changed
 - BREAKING CHANGE: Changed maven artifactId to "client"
   [#9](https://github.com/tzaeschke/phtree-cpp/pull/9)